Improvement in scroll-saw



l l IEP N. PETERS, PHOTO-LITHOGRAPNER. WASHINGTON?, D` C.

To all 'whom it 'may concern yeinem Cerca NICHOLAS 1B@ HADLnYyor PROVIDENE, RHODE ISLAND.

Lette/rs Patent No. 106,153, dated August 9, 1870.

IMPROVEMENT `tnv SCROLL-SAW.

1.11e\ S :l1edu1e` referred to in these, Letters `Patent and making part of the same Beit known that I, NIcHoLAjs 13.HAD`LEY, of the city and county of Providence, in the State of Rhode Island, haveA invented anew and improved Scrolh l ASaw, and Iy do `hereby,declare that the following specification, taken iufconnection with the drawingmaking a part-of the same, is a full, clear, andexact description thereof'. v i

Figurelisa view in` section and elevation' of my Figures 2, 3, and'd are parts of the same, detached. The obyectoi' my `invention is to so construct the operating mechanism of'a `scroll-saw that the ordi nary supportingposts or timbers may beV dispensed A. with, thus giving to the material being operated upon entire freedom as to space, and also to provide such mechanism with certain other improvements, having reference to securngzauc'l adjusting the saw, hereinafter more particularly described land claimed The various mechanisms now in use for operating scrollsaws have `usuallybeen constructed upon such principlcs,'and so arranged as to require supporting from"the floor, the supporting timbers or posts coming so near the saw as to seriously interfere with the` convenient manna-gement of the material heilig worked. Such mechanisms `have usually employed a carriagcsliding between two uprights, to which carriage the saw is attached, andi'rom which it receives its perpendicular motion. This arrangement, `however, upon each change of movement, produces a sudden bend iuthe saw, and a subsequent jerk, which not only frequently breaks and damages the saw itself, but affects the quality of the work being performed. In my invention I attach the frame-work that supfports themechanism `to the ceiling, the side, aud the floor oi' the room, as shown in iig. 1.

The saw is attachedat each end to barsA and A',

`in the mannerhereinatter described, which slide in guides B and B upon therframe.

The bar A is connected to the horizontal ari 'i ofthe to the bar A, and cou'sequentlyto the saw.

A correspondngmovement is communicated to the l bar A', which holds the lower end oi' the saw, from the lever a through tbefrodsfD Dl D, and the levers E E1 E.

drilling itat each end to receive a pin or screw, as` is usuallyrdone, which weakens it, and increases its liability t-o break, but add to the strength of the saw'by providing each end with a circular enlargemenhas shown in' Iig. 4, and insert the ends of the saw thus' made in the ends of the bars A' and A' mortised to receive them, and secure them therein 'by means of a collarand thumb-screw, as shown. in fig. 2.y

In case, however, the saw should become -shorter by breaking, or otherwise, it would become` necessary to adj ustthe bars A and A to the length ofthe saw; for this purpose I connect the bar A, as show-n in 2 and 3, to the lever a,hy a Heet-ing connection consisting 0i the yoke 1"', and the rod G, which is provided with a series of annular grooves, and the head oi: the yoke Fwith a latch, as shown in iig. 3, which fits into the grooves' upon the rod G, and secure it at any desired Iengtln'the adjustment being completed, and the saw brought to its proper tension by the thumb-screw H. v

What I claim asv my invention, and desire to secure by Letters Patent, isg 1. ',Lhemechausm herein shown for operatiuga scrolhsaug consisting cf a series of quadrant-s, in combination with a sexies of parallel rods,- the whole coustructedaud arranged in the manner substantially7 as desclibed.

2. rlhe ecting connection shown in iig. 2, consisting of the yoke l", the rod G, latch and thumb-screw H, the whole constructed and arranged in the mauncr substantially as described.

3. Asaw provided with a circular enlargement at each end, and attached to the bars A and A', in the manner substantially as described.

- N. B. HADLEY.' Witnesses: e l

WALTERB. Vnvons, GEORGE O. FALL.

'aient @time 

